Is there a big difference between single channel and 2.0 channel of Bluetooth speaker?

There is a big difference. Bluetooth speaker mono and 2.0 channel are very different, because Bluetooth speaker mono refers to one speaker, while Bluetooth speaker 2.0 channel is two speakers, and the sound effect is completely different. Monophonic sounds dry, so it is usually used when listening to the radio, and the two channels are stereo, which is usually used to listen to music. The stereo effect of two channels is closely related to the quality of transmission audio lines. Therefore, the mono channel and 2.0 channel of Bluetooth speakers are very different.